Should roots touch water in LECA?
When it comes to using LECA (Lightweight Expanded Clay Aggregate) as a growing medium for plants, the question of whether roots should touch water is a common one. The answer to this question is both simple and complex, as it depends on various factors such as the type of plant, the size of the LECA particles, and the watering technique employed.
In general, LECA is a highly porous material that has the ability to absorb and retain moisture. This is one of the main advantages of using LECA as a growing medium, as it provides a consistent and controlled water supply to the roots of the plants. However, it is important to note that LECA should not be saturated with water, as this can lead to root rot and other issues.
To ensure that roots do not touch water in LECA, it is essential to maintain the water reservoir at the bottom of the container, below the level of the roots. This reservoir should be regularly topped up to ensure a constant supply of water to the plants. By doing so, the roots will be able to take up the water they need, while any excess water will drain away.
One of the key benefits of LECA is its ability to absorb about 30% of its weight in water, with the remaining water draining away. This ensures that the roots are not constantly submerged in water, which can lead to oxygen deprivation and root suffocation. By allowing the roots to access the water as needed, you can avoid over-watering and provide a healthier growing environment for your plants.
In my personal experience, I have found that using LECA with a water reservoir system has been highly effective. I have seen plants thrive and grow vigorously, with minimal issues related to over-watering. By keeping the water reservoir topped up, I have been able to provide a consistent water supply to the roots, allowing them to access water as needed without being submerged.
To summarize, roots should not directly touch water in LECA. Instead, the water reservoir should be maintained at the bottom, below the root level. This allows the roots to take up water as needed, while excess water drains away. By following this approach, you can ensure optimal water uptake for your plants and avoid the negative effects of over-watering.
